Freiburg 2024 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 15: Poster I

A 15.4: Poster

Dienstag, 12. März 2024, 17:00–19:00, Tent A

Entanglement created in ultracold collisions: a realistic model study — •Yimeng Wang, Karl P. Horn, and Christiane P. Koch — Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany

Despite being one of the most common and straightforward ways of generating entanglement between two particles, the creation of entanglement in collisions has never been comprehensively studied beyond 1D or toy models. Here, we seek to quantify the degree of entanglement generated in ultracold atomic collisions by computing the inter-particle purity, focusing first on the motional degree of freedom. As the entanglement generated in collisions depends rather sensitively on the initial conditions, we consider two elongated Gaussian wave packets as pre-collision states, whose shapes are determined by the uncertainty of the transverse and longitudinal momenta, to model the realistic experimental settings as possible. Apart from the initial conditions for the particle motion, we study how the partial-wave scattering phase shifts, the energy derivative of which signals a resonance state, influence the degree of entanglement.

Keywords: entanglement; ultracold collisions